On Bounded Degree Graphs with Large Size-Ramsey Numbers

On Bounded Degree Graphs with Large Size-Ramsey Numbers
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DOI:
10.1007/s00493-023-00056-1
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发表时间:
2022-10
期刊:
Comb.
影响因子:
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通讯作者:
K. Tikhomirov
K. Tikhomirov
中科院分区:
其他
文献类型:
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作者:
K. Tikhomirov

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图的大小Ramsey数定义为最小的整数,使得存在一个图G,其边的每一个2-着色都包含一个的单色拷贝。Rödl和Szemerédi通过讨论Beck的一个问题,证明了对于任意的图,存在n个顶点,每个顶点的度至多为3,对于一个普适常数,其大小Ramsey数至少为3。在本说明中,我们表明,修改Rödl和Szemerédi的建设导致一个界限。
The size-Ramsey numberof a graphis defined as the smallest integermso that there exists a graphGwithmedges such that every 2–coloring of the edges ofGcontains a monochromatic copy of. Answering a question of Beck, Rödl and Szemerédi showed that for everythere exists a graphonnvertices each of degree at most three, with size-Ramsey number at leastfor a universal constant. In this note we show that a modification of Rödl and Szemerédi’s construction leads to a bound.